Assessment of fracture characteristics controlling fluid flow performance in discrete fracture networks (DFN)

摘要: Abstract Fractures play a crucial role in earth resource engineering, such as geothermal exploitation, coalbed methane (CBM) extraction, and hydraulic fracturing. Breaches, main channels of fluid flow, have various characteristics, aperture, density, persistence that could affect the transmissivity. Due to difficulty distinguishing contribution fracture parameters flow fractured coal rock mass, numerical simulation is necessary simulate fractures versus benchmarks obtain realistic data study variation rate with parameters. In this paper, discrete element method (DEM) was used rebuild spatial distribution DFN modeling, results were compared field test Yilgarn area Western Australia. On basis, dependences on obtained. path considered rectangular section, its geometry determined by aperture persistence. As circular fracture, an influential factor lengths. Besides, length mass increased increase density. According cubic law, has direct relationship opening, number channels, but inverse length, which consistent results. Results showed aperture. Meanwhile, non-linear. When size small, gradually. However, rise size, flux abruptly. Finally, fluctuated increasing This research will enhance knowledge extraction performance CBM, geothermal, oil in-suit leaching through media.